<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
      <table border="2px" width="600px" height="500px" cellspacing="0" cellpadding="70px"
      align="center">
      <thead>  <!--表格头部区域-->
        <tr> 
            <th>姓名</th>
            <th>性别</th>
            <th>年龄</th>
        </tr>
    </thead>
       <!-- <tr> 
          <td>姓名</td>
          <td>性别</td>
          <td>年龄</td>
       </tr> -->
    <tbody>
        <tr>
            <td>张三</td>
            <td rowspan="2">男</td>
            <td>18</td>
        </tr>
        <tr>
            <td>李四</td>
            <!-- <td>男</td> -->
            <td>28</td>
        </tr>
        <tr>
            <td colspan="2">张红/女</td>
            <!-- <td>女</td> -->
            <td>5</td>
        </tr>
    </tbody>   
      
      </table>
</body>
</html>